I checked out the video and I have no idea how you didn't win first place. I would like to see the ones that came in before you (I have a feeling it may have been rigged LOL). You could try the same type of costume with a different theme, perhaps a ghost or an alien where you can use some lighting effects that would be easy to rig. If you search battery light string on amazon there are a lot of different options. If it were me I would go for a goul/ghost effect supersized with several layers of sheer white fabric and use blue lighting effects underneath. It will give you the illusion that you are looking for and create a flowing effect. You could use the same type of mask or somethething with more white in it to give you a spectral feel. I have used small fans mounted to wire hoops to make the bottom of a costume constantly move which gives the floating effect (also it makes wearing a costume in a hot bar or party much cooler
.
Don't know if that is up your alley, ( I already am mapping this costume out in my head
so if you make one I would love to see it.)
Don't know if that is up your alley, ( I already am mapping this costume out in my head